From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1go6mK-0004me-BO for barebox@lists.infradead.org; Mon, 28 Jan 2019 13:16:45 +0000 From: Sascha Hauer Date: Mon, 28 Jan 2019 14:16:39 +0100 Message-Id: <20190128131640.3692-1-s.hauer@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/2] mtd: peb: Add function to skip bad blocks To: Barebox List Cc: Ahmad Fatoum This adds a function that given a pointer to a PEB number increases the number until the corresponding PEB is good. It also checks for the PEB number being inside the mtd device. Signed-off-by: Sascha Hauer --- drivers/mtd/peb.c | 27 +++++++++++++++++++++++++++ include/mtd/mtd-peb.h | 1 + 2 files changed, 28 insertions(+) diff --git a/drivers/mtd/peb.c b/drivers/mtd/peb.c index c35b63f2fd..388db7f587 100644 --- a/drivers/mtd/peb.c +++ b/drivers/mtd/peb.c @@ -129,6 +129,33 @@ int mtd_num_pebs(struct mtd_info *mtd) return mtd_div_by_eb(mtd->size, mtd); } +/** + * mtd_skip_bad - skip bad blocks + * @mtd: mtd device + * @pnum: The number of the block + * + * This function skips bad blocks beginning from @pnum. Returns 0 for success and + * a negative error code otherwise. on successful exit @pnum points to the next + * good block. + */ +int mtd_skip_bad(struct mtd_info *mtd, int *pnum) +{ + if (*pnum < 0) + return -EINVAL; + + while (1) { + loff_t offset = (uint64_t)mtd->erasesize * *pnum; + + if (offset >= mtd->size) + return -ENOSPC; + + if (!mtd_block_isbad(mtd, offset)) + return 0; + + *pnum = *pnum + 1; + } +} + /** * mtd_peb_mark_bad - mark a physical eraseblock as bad * @mtd: mtd device diff --git a/include/mtd/mtd-peb.h b/include/mtd/mtd-peb.h index e4fd01df90..23f89d89a8 100644 --- a/include/mtd/mtd-peb.h +++ b/include/mtd/mtd-peb.h @@ -12,6 +12,7 @@ int mtd_peb_torture(struct mtd_info *mtd, int pnum); int mtd_peb_erase(struct mtd_info *mtd, int pnum); int mtd_peb_mark_bad(struct mtd_info *mtd, int pnum); int mtd_peb_is_bad(struct mtd_info *mtd, int pnum); +int mtd_skip_bad(struct mtd_info *mtd, int *pnum); int mtd_peb_check_all_ff(struct mtd_info *mtd, int pnum, int offset, int len, int warn); int mtd_peb_verify(struct mtd_info *mtd, const void *buf, int pnum, -- 2.20.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox